The Influential Factors and Charactristics of Triassic Yanchang Formation Reservior in the Zichang Delta, Ordos Basin, China

Based on the theory of sedimentary petrology, mineral petrology, reservoir geology, well logging geology, exploitation geology and petroleum geology, and reservoir engineering, in combination with outcrop, core, thin section, scanning electron microscope, mercury intrusion and X-ray et al, this paper discussed the characteristics of the low penetrability reservoir of Chang 2 member and the ultra- low penetrability reservoir of Chang 6 member of the Zichang oilfield in the east of Shanbei slope.